Method and apparatus for transporting a coated paper web

ABSTRACT

A slotted panel is mounted adjacent a coating roll. A web of predetermined length is passed across the coating roll and a coating of adhesive material is applied to the bottom of the web. The coated web is transported from the coating roll to a winding mandrel. Air is jetted along the length of slots in the panel. The air is jetted across the top of the panel and the top of the web is thus held against the bottom of the panel by venturi effect. The web is then transported along the bottom of the panel. After the web leaves the slotted panel, it is wound into a cylinder or drum on the winding mandrel.

l United States Patent 3,685,7l0 [451 Aug. 22, 1972 Roulo [54] METHOD ANDAPPARATUS FOR 3,472,439 10/1969 Eastcott...... .......226/195 TRANSPORTING A COATED PAPER WEB [72] Inventor:

Primary Examiner-Richard A. Schacher Attorney-Americas Mitchell, Joseph E. Kerwin and William A. Dittmann Ronald H. Roulo, Palos Heights, Ill.

9 Inc',

[73] Assignee: Continental Can Com New York, N.Y.

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n mm1 panel, it is wound into a cylinder or drum on the winding mandrel.

UNrrEDsTATEsPATEN'Is 3,396,887 8/1968 Bade.....,............;..;...

4Claims,1DrawinglFigure METHOD AND APPARATUS FOR TRANSPORTING A COATED PAPER WEB My invention relates to a web handling device and more particularly to a device for transferring a web having a wet or tacky bottom side.

Prior to the present invention in the manufacture of fiber or paper drums, the web was coated by the cold coating roll and allowed to proceed at random over to the winding mandrel. It was found by experimentation, however, that since the web had adhesive coating on it,

mandrel. After a full tum 11 of the uncoated web of paper has been wound onto the mandrel, the sticky part 12 of the web of paper is wound onto the mandrel. AS the web is wound onto the mandrel, the sticky side of the web adheres to the back 11 of the preceding layer and a drum is formed. In this way, the inside of the drum hasno adhesive material on it.

it tended to stick to the coating roll because of higher viscosity and thus went across toward the winding man.

drel but passed under it or actually struck the winding mandrel. lt is necessary to increase the size of the winding mandrel to allow for the manufacture of large drums. As the size of the winding mandrel is varied, it is necessary to vary the angle at which the web must travel from the coating roll onto the winding mandrel. A device is necessary to direct the web of paper from the coating roll to an appropriate position adjacent to the winding mandrel. This necessity gave rise to my invention.

It is an object of my invention to provide controlled feeding of an unsupported web travelling at an angle off the horizontal plane. g l

It is a further object of my invention to provide sup- I port for aftravelling web which has tacky adhesive on its bottom side or wherelthe bottom side is wet.

In brief, my invention is drawn to a slotted paper support panel having a series of air blasts passing across the backside of the panel. The direction of these air blasts is in line with the slots so that a venturi eHect is created above the slots to draw the advancing web of paper up against the bottom of the panel. The panel is located betweenthe coating roll and the winding mandrel.

Referring to the drawings wherein like reference characters refer to like parts:

The figure shows a schematic or perspective view of my invention.

The web of paper 1 is fed from a storage place on the left. The paper being conveyed consists of a series of webs of paper each being of a predetermined length. The length and width of the web of paper depends upon the size and wall thickness desired for the finished drum. In the figure, two pull rolls, 2, 3 are shown located one above the other and designed to draw the web of paper from a place of storage to the left and convey it to a coating roll 4. On the exterior of the coating roll 4 is a thin layer of an adhesive 5 or the like to be deposited on the bottom side 6 of the web of paper. As the web of paper passes between the coating roll 4 and a holddown roll 7, the coating material 5, which may be adhesive, is deposited onto the bottom side 6 of the web of paper. Coating material comes from a puddle 8 of coating material located in the nip between'rolls 4 and 28. l

As a matter of fact, in this process little or no coating In order to control the direction of travel of the web of paper as it travels between the coating roll 4 and the winding mandrel 9, I have placed the slotted paper support panel 10 between the coating roll and the winding mandrel. The panel is preferably flat on both sides. Mounted across the top near the edge of the panel l0 and located closest to the coating roll isv an air blast tube 13. This tube has a series of orifices 14-20, etc. located at the left lhand side of each slot in the support panel as shown in the drawing. Pressured air is supplied continuously from a source of air pressure (not shown) to the air blast tube 13 and exits through the orifices 14 l 20. This pressure air jetting along the length of the point. This requirement is met because the maximum or adhesive is put onto the first part of the web of paper air'blast is at the point closest to the orice and thus the maximum venturi effect is found at that position.

Any size support panel maybe used 40 be consistent with the size of vdrum to be manufactured. If a drum is large in diameter, the support must be longer because the winding mandrel is large and must be located a distance from the coating roll 4 and the meter roll 28. In practice support panels may vary in width from about 36 inches to about 8,1 inches.

If the drum is small in diameter, then the length of the support panel may be less. If the drum is a long drum, then the support panel must be wide and have more slots in it than for a small drum. Further, as the size of the drum varies, the angle which the support panel vmakes with the horizontal must be varied. This angle must be the correct one to assure the feed of the segmented web from the coating roll to the winding l mandrel. In present usage, the drum diameter varies from about 1"1 inches to about 23 inches.

The foregoing is a description of an illustrative embodiment of the invention, and it is applicants intention in the appended claims to cover all forms which fall within the scope of the invention.

What is claimed is:

l. A web transporting device for transferring a web from a coating roll to a winding mandrel comprising:

a flat panel lying in a plane extending generally tangential to the top of a coating roll and the top of the winding mandrel.

slot means in said panel extending perpendicular to the longitudinal axis of said coating roll and the winding mandrel, and

means for jetting a stream of air above and along the length of said slot whereby a web is drawn against the bottom of said flat panel as it traverses the space from said coating roll to said winding mandrel.

2. A web transporting device as set forth in Claim l in which said flat panel comprises:

a sheet of a stiff material having a width greater than the width of said web and a length less than the distance between the axis of said coating roll and said winding mandrel.

3. A web transporting device as set forth in Claim 1 in which said means for jetting a stream of air comprises:

a tube having a closed end extending along the top of the edge of said flat panel, and

ports in the side of said tube for directing said stream of air along the length of each slot.

4. In a drum fabricating apparatus having a coating roll and a hold-down roll mounted a distance from a winding mandrel, the improvement comprising;

a stiff sheet having a flat underside lying in a plane extending generally tangent to the top of a coating roll and the top of a winding mandrel,

at least one passageway in said sheet having an oblong cross-section and located with its long axis extending in a direction from the coating roll toward the winding mandrel, and

means for jetting a stream of air along the length of each passageway and above the passageway whereby a web of flat material may be drawn up against the bottom of said stiff sheet as it traverses the space from said coating roll to said winding mandrel. 

1. A web transporting device for transferring a web from a coating roll to a winding mandrel comprising: a flat panel lying in a plane extending generally tangential to the top of a coating roll and the top of the winding mandrel. slot means in said panel extending perpendicular to the longitudinal axis of said coating roll and the winding mandrel, and means for jetting a stream of air above and along the length of said slot whereby a web is drawn against the bottom of said flat panel as it traverses the space from said coating roll to said winding mandrel.
 2. A web transporting device as set forth in Claim 1 in which said flat panel comprises: a sheet of a stiff material having a width greaTer than the width of said web and a length less than the distance between the axis of said coating roll and said winding mandrel.
 3. A web transporting device as set forth in Claim 1 in which said means for jetting a stream of air comprises: a tube having a closed end extending along the top of the edge of said flat panel, and ports in the side of said tube for directing said stream of air along the length of each slot.
 4. In a drum fabricating apparatus having a coating roll and a hold-down roll mounted a distance from a winding mandrel, the improvement comprising; a stiff sheet having a flat underside lying in a plane extending generally tangent to the top of a coating roll and the top of a winding mandrel, at least one passageway in said sheet having an oblong cross-section and located with its long axis extending in a direction from the coating roll toward the winding mandrel, and means for jetting a stream of air along the length of each passageway and above the passageway whereby a web of flat material may be drawn up against the bottom of said stiff sheet as it traverses the space from said coating roll to said winding mandrel. 